The shaftless screw conveyor is a new type of screw conveyor. The manufacturing design meets the standard. Compared with the axial screw conveyor, because of the axial free design and the use of the integral steel screw pushing material with certain flexibility, the axial-free spiral conveyor has the following outstanding advantages: strong anti winding and no shaft interference, and has special advantages for the belt conveyor and easy to wrap materials The more sex. Because the screw has no shaft, the material is not easy to block and the discharge port is not blocked, so it can run at a lower speed, drive smoothly and reduce energy consumption. The torque can reach 4000N / m. The transportation volume is large. The capacity of the axial-free screw conveyor is 1.5 times of that of the traditional axial screw conveyor with the same diameter and the conveying distance is long. The single machine can be transported for 60 meters. And according to the needs of users, multi-stage series installation is adopted, and the material can be transported for a long distance, and can be operated by mobile.

　　The axial-free screw conveyor is mainly composed of driving device, head assembly, casing, axle free spiral body, slot liner, feed port, discharge port, machine cover (if necessary), base, etc. The drive device adopts cycloid needle wheel reducer or shaft mounted hard tooth gear reducer. When designing, the drive device shall be set at the outlet end as far as possible so that the screw body is in the tension state during operation. The head of the axial screw conveyor is equipped with thrust bearing, which can bear the axial force when conveying materials. The casing is U-shaped or O-type, and the upper part is equipped with rain proof cover, and the material is stainless steel or carbon steel or glass fiber reinforced plastic. The material of the groove liner is the wear-resistant plastic plate or rubber plate or cast stone plate. There are two kinds of inlet and outlet ports, square and round, and the form of the inlet and outlet is decided by the user.

　　The shaft free screw conveyor has the advantages of simple structure, low manufacturing cost, strong sealing and convenient operation. It can be loaded and unloaded at multiple points in the middle. It is widely used in chemical industry, building materials, metallurgy, grain and other departments. Under the condition of inclination angle β < 20 °, the powder, granular and small materials with small viscosity, not easy to deteriorate and no locust agglomerations are transported.

　　The Rongcheng spiral conveyor is made of carbon steel, 304 and 201. The products of Rongcheng water conservancy screw conveyor are: axial screw conveyor, axial-free screw conveyor, U-type screw conveyor, tube screw conveyor, straight screw conveyor, inclined screw conveyor, circular spiral conveyor, different customers' different needs.